- #1

chwala

Gold Member

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- Homework Statement
- see attached

- Relevant Equations
- linear algebra

solution;

@Mark44 we discussed this sometime back on the forum. The approach of using determinant or echelon form of a matrix was sufficient.

Would i be correct to use this approach,

##x+2y+3z=4x+5y+6z##

##3x+3y+3z=0##

and

##7x+8y+9z=x+2y+3z##

##6x+6y+6z=0##

Then, it follows that the two equations are dependent i.e

##6x+6y+6z= 2(3x+3y+3z)##

thus the system cannot have a unique solution.